Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a confederação quando restam 4 lugares nas finais?
 ###Tabelas: CREATE TABLE canadian_open (canadian_open_id AUTO_INCREMENT PRIMARY KEY, Year VARCHAR, Men's singles VARCHAR, Women's singles VARCHAR, Men's doubles VARCHAR, Women's doubles VARCHAR, Mixed doubles VARCHAR) CREATE TABLE match_details (match_details_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, League position VARCHAR, Opponents VARCHAR, Venue VARCHAR, Result VARCHAR, Score F–A VARCHAR, Attendance INT) CREATE TABLE ministry_of_higher_education (ministry_of_higher_education_id AUTO_INCREMENT PRIMARY KEY, Name in English VARCHAR, Name in Malay VARCHAR, Acronym VARCHAR, Foundation VARCHAR, Location VARCHAR) CREATE TABLE comparative_performance_in_the_latin_american_market (comparative_performance_in_the_latin_american_market_id AUTO_INCREMENT PRIMARY KEY, Selected Caribbean and n Latin America countries VARCHAR, Internl. tourist arrivals 2011 (x1000) INT, Internl. tourism receipts 2011 (million USD ) VARCHAR, Receipts per arrival 2010 (col 2)/(col 1) ( USD ) VARCHAR, Receipts per capita 2005 USD INT, Revenues as % of exports goods and services 2011 VARCHAR) CREATE TABLE summary_of_qualification (summary_of_qualification_id AUTO_INCREMENT PRIMARY KEY, Confederation VARCHAR, Teams started VARCHAR, Teams that have secured qualification VARCHAR, Teams that can still qualify VARCHAR, Teams that have been eliminated VARCHAR, Remaining places in finals VARCHAR, Total places in finals VARCHAR, Qualifying start date VARCHAR, Qualifying end date VARCHAR)  
SELECT Confederation FROM summary_of_qualification WHERE Remaining places in finals = 4